code: def _create_chunk(self, output_idx, index, **kw):
      data = FuseChunkData(_index=index, _op=self, **kw)
      return FuseChunk(data)
  
file_path: mars/mars/core/operand/fuse.py
imports: from ...None import opcodes
  from ...serialization.serializables import ReferenceField
  from ..entity import FuseChunk, FuseChunkData, NotSupportTile
  from ..graph import ChunkGraph
  from .base import Operand
label_desc: Use image node_id 1 for calling the FuseChunkMixin obj's underlying member method code with example usage: obj._create_chunk(output_idx, index) and returns: FuseChunk